DEVELOPMENT OF CONCEPTUAL TECHNICAL SOLUTIONS AND METHODS OF THEIR IMPLEMENTATION DURING THE DESIGN OF A DUST COAL STEAM GENERATOR OF SUPER-SUPER CRITICAL PARAMETERS OF STEAM 28 MPa / 600 °С / 600 °C FOR 300 MW ENERGY UNIT. PART 2

  • B.B. Rokhman Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • N.I. Dunaevska Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • V.G. Vifatnyuk Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
Keywords: steam generator, pressure, temperature, boiler, technique, furnace, coal, combustion

Abstract

In the second part of the work, using the mathematical model described in first unit, a direct-flow pulverized coal boiler with supercritical steam parameters of 28 MPa /600 °C /600 °C was calculated for a 300 MW power unit at loads of 50–70 %. It is shown that: a) the temperature of contaminated screens 1234 °С in the active combustion zone, where 92 % of the initial fuel burns out, is lower than the temperature of slagging beginning (1268 °С) of ДГ-100 coal, which indicates the slag-free operation of the screens of the lower radiation part (LRP) b) over the entire range of the boiler load change of 50–100 %, the temperature at the exit from the active combustion zone will be higher than the minimum permissible temperature of 1250 °C, below which the flame is attenuated; c) upon transition to 50 % load, the temperature of gases at the outlet from the active combustion zone decreases from 1506 °C to 1342 °C, as a result of which the specific thermal stress of the LRP screens decreases by 1.469 times, while the feed water consumption at the inlet of the boiler falls by 2 times, which leads to an increase in the temperature of the LRP steam, the middle and upper radiation parts, screens of the ceiling and rotating chamber; d) to reduce the thermal stratification of the inlet stage of the secondary steam superheater (ППП1), and as a consequence, the pipe wall temperature, it is necessary to divide the ППП1 surface into two packets, installing an intermediate mixing manifold between them with full steam mixing. Bibl. 5, Fig. 13, Tab. 3.

Author Biographies

B.B. Rokhman, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

N.I. Dunaevska, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

References

Rokhman B.B, Dunaevskaya N.I, Vifatnyuk V.G Development of conceptual technical solutions and methods of their implementation in the design of a dust coal steam generator of super-super critical pa-rameters of steam 28 MPa/600 С/600 С for a 300 MW energy unit. Part 1. Mathematical description of the working processes, calculation results and boiler arrangements. Energotechnologies and Resource Sav-ing. [Energotekhnologii i resursosberegeniie.]. 2020. No. 1. pp. 4–19. (Ukr.)

Verbovetskiy E.Kh., Zhmerika N.G. Metodicheskie ukazaniya po proektirovaniyu topo-chnykh ustrojstv energeticheskikh kotlov. [Methodi-cal guidelines for the design of combustion devices for power boilers]. St. Petersburg, 1996. 270 p. (Rus.)

Petrenya Yu.K., Gilde E.E., Sudakov A.V., Chizhik A.A., and others. Normy rascheta na prochnost staczionarnykh kotlov i truboprovodov para i goryachej vody (RD 10-249-98). [Standards for calcu-lating the strength of stationary boilers and pipelines of steam and hot water (RD 10-249-98)]. Ser. 20. Iss. 4. Moscow, 2010. 344 p. (Rus.).

Kuznetsov N.V., Mitor V.V., and others. Teplovoy raschet kotelnyih agregatov (Normativnyiy metod). [Thermal calculation of boiler units (Norma-tive method)]. Moscow : Energiya, 1973. 296 p. (Rus.)

Teplovoy raschet kotlov (Normativnyiy metod). [Thermal calculation of boilers (Normative method)]. St. Petersburg, 1998. 259 p. (Rus.)

Published
2021-03-20
How to Cite
Rokhman, B., Dunaevska, N., & Vifatnyuk, V. (2021). DEVELOPMENT OF CONCEPTUAL TECHNICAL SOLUTIONS AND METHODS OF THEIR IMPLEMENTATION DURING THE DESIGN OF A DUST COAL STEAM GENERATOR OF SUPER-SUPER CRITICAL PARAMETERS OF STEAM 28 MPa / 600 °С / 600 °C FOR 300 MW ENERGY UNIT. PART 2. Energy Technologies & Resource Saving, (1), 4-23. https://doi.org/10.33070/etars.1.2021.01